Abstract
The purpose of this study was to evaluate the effec t of early care of oral hygiene for very young handicapped infants and to estimate the relationships between the caries incidence rate and eruption of decideous teeth and body growth, by using semilongitudinal materials, especially for infants who were small for their age.
The materials were obtained from 78 infants (49 cerebral p alsied infants and 29infants with Down's syndrome). At each periodical inspection, the data on number of erupted decideous teeth and def teeth, and caries activity were collected and data of body height and weight were obtained from medical records. The subjects ranged in age from 4 to 48 months.
The following results were obtained;
